function GetRadioButtonSelectedValue(rb_id) {
    var a = '';
    var f = document.forms[0];
    var e = f.elements[rb_id];

    for (var i=0; i < e.length; i++) {
      if (e[i].checked) {
        a = e[i].value;
        break;
      }
    }
    return a;
  }


  function GetRadioButtonSelectedIndex(rb_id) {
    var a = -1;
    var f = document.forms[0];
    var e = f.elements[rb_id];

    for (var i=0; i < e.length; i++) {
      if (e[i].checked) {
        a = i;
        break;
      }
    }
    return a;
  }